Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- n. A small valve or faucet used to drain or reduce pressure, as from a boiler.
Wiktionary
- n. A small valve, spout, or faucet operated by hand, usually used to release pressure or drain fluid.
WordNet 3.0
- n. regulator consisting of a small cock or faucet or valve for letting out air or releasing compression or draining
Etymologies
- Perhaps pet1 + cock1. (American Heritage® Dictionary of the English Language, Fourth Edition)
Examples
“Most quads already have a fuel filter in the petcock, though, and adding another one is overkill.”
“Drain gas from my bike's petcock into a 1 gallon ziploc bag. then pour from bag into Phil's tank, and voila! we make it to the next gas stop.”
“The heat touched off the Hi-Thrust which burst in a needle flame from the petcock.”
“Foyle opened the drainage petcock in the combustion chamber of the jet and tortuously filled the chamber with fuel by hand.”
“She set the kettle on the ground, knelt to search for the petcock, and only then turned on the flashlight, remembering as she always did when she saw its jabbing circle of light, how much it had cost and how Clovis was always having to buy batteries for it.”
“One crawled in and settled down, and turned the petcock that inflated the cover.”
“You could even have it keep a reserve charge which must be manually switched in, much like the old motorcycle petcock valves on the fuel line.”
“Theres all new antifreeze, new iridium spark plugs, cleaned K&N air filter, fixed petcock, all new brake fluid front and rear and their bleed very well.”
WN.com - Articles related to Test your fuel-economy know-how
“If your bike has a carburetors and petcock, close the petcock while the bike is running until it stops.”
“- New fuel lines, fuel filters and petcock (fuel valve) - New ignition switch”
Lists
These user-created lists contain the word ‘petcock’.
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phrontistery - p
from phrontistery.info
pustule, purulence, pushful, purser, purpureal, putative, purpure, purpresture, purloin, purline, purlieu, purlicue and 1766 more...
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End in -ock
Inspired by fbharjo (see spitchcock).
spitchcock, hillock, willock, peacock, pajock, penock, yapock, sycock, bittock, bawcock, burrock, cammock and 168 more...
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AbraxasZugzwang's Words
atavism, abraxas, sisyphean, frust, fetus-in-fetu, arhythmically, queef, epidemiology, abecedarian, troglodyte, chiaroscuro, philology and 631 more...
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learning
A list of words whose meanings I am learning, either because a) I don't know the meaning b) I know the meaning, but could stand to better appreciate certain inflections or secondary meanings or c) ...
louche, educe, loam, cob, sclerotic, palliate, axial, syndicalist, ecumenical, sally, fatuous, parvenu and 1381 more...
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Industrial
electrodeposition, photovoltaic, superconductivity, photoelectrochemical, gearhead, pig iron, cogeneration, capacitor, blast furnace slag, coaxial, daisy chaining, commutator and 93 more...
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Just 'cause I like 'em, P
pellucid, pertain, pampas, prate, pinecone, philistine, pantocrator, papaverine, postmeridian, potlatch, pharology, pinniped and 622 more...
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Silly-Sounding Suckers
degringolade, squoze, hootenanny, abligurition, aberuncate, all-overish, hooroosh, booboisie, smell-feast, petcock, obzocky, jehu and 31 more...
Tweets
Looking for tweets for petcock.

bilby "Pressure canners for use in the home were extensively redesigned beginning in the 1970's. Models made before the 1970's were heavy-walled kettles with clamp-on or turn-on lids. They were fitted with a dial gauge, a vent port in the form of a petcock or covered with a counterweight, and a safety fuse."
- 'Using Pressure Canners', Elizabeth L. Andress. Apr 5, 2008